EP2680995A1

EP2680995A1 - Portable machine tool

Info

Publication number: EP2680995A1
Application number: EP12716216.2A
Authority: EP
Inventors: Rudolf Fuchs
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2011-03-03
Filing date: 2012-03-02
Publication date: 2014-01-08
Anticipated expiration: 2032-03-02
Also published as: CN103402683A; DE102011005036A1; CN103402683B; EP2680995B1; US20140047721A1; US9610698B2; RU2013144242A; RU2609111C2; US20160221207A1; US9339878B2; WO2012116827A1

Abstract

The invention relates to a portable machine tool, in particular a hand-held machine tool, comprising at least one coupling device (12a; 12b) which is designed to be coupled to a machine tool separation device having at least one cutting unit (14a; 14b) and at least one guide unit (16a; 16b) for guiding the cutting unit (14a; 14b). According to the invention, the portable machine tool comprises at least one machine tool stabilising device (20a; 20b) which comprises, in an area outside the coupling device (12a; 12b), at least one stabilising element (22a; 22b) having at least one support surface (24a; 24b) for stabilising the machine tool separation device.

Description

description

Portable machine tool

State of the art

Portable machine tools are already known which have a coupling device. The coupling device is in this case provided for coupling to a machine tool separating device comprising at least one cutting strand and at least one guide unit for guiding the cutting strand.

Disclosure of the invention

The invention is based on a portable power tool, in particular a hand tool, with at least one coupling device which is provided for coupling to a machine tool separating device comprising at least one cutting strand and at least one guide unit for guiding the cutting strand.

It is proposed that the portable power tool comprises a tool stabilizing device which has at least one stabilizing element with at least one support surface for stabilizing the power-tool parting device in an area arranged outside the coupling device. A "portable power tool" is to be understood here in particular as meaning a power tool, in particular a hand tool, which can be transported by an operator so that it can not be transported by a machine The portable power tool in particular has a mass which is less than 40 kg, preferably less than 10 kg and particularly preferably smaller

CONFIRMATION COPY than 5 kg. A "coupling device" is to be understood here as meaning, in particular, a device which is intended to operatively connect the machine tool separating device to the portable machine tool by means of a positive and / or non-positive connection for machining a workpiece. In an operating state of the portable power tool, forces and / or torques are transmitted from the drive unit of the portable power tool for driving the cutting strand to the power-tool parting device, thus the coupling device is preferably designed as a tool receptacle Unit to be understood, which is intended to locally cancel a nuclear cohesion of a workpiece to be machined, in particular by means of a mechanical Abtren nens and / or by means of a mechanical removal of material particles of the workpiece. The term "provided" is to be understood here to mean in particular specially designed and / or specially equipped.The cutting strand is preferably intended to separate the workpiece into at least two physically separate parts and / or at least partially remove material particles of the workpiece from a surface of the workpiece. Separate piece and / or remove

Cutting strand moves circumferentially in at least one operating state, in particular along a circumference of the guide unit.

A "guiding unit" is to be understood here in particular as meaning a unit which is intended to provide a force of compulsion at least along one

Direction perpendicular to a cutting direction of the cutting strand to exert on the cutting strand to specify a possibility of movement of the cutting strand along the cutting direction. Preferably, the guide unit has at least one guide element, in particular a guide groove, through which the cutting strand is guided. Preferably, the cutting strand, in a

Viewing cutting plane, guided along an entire circumference of the guide unit by the guide unit by means of the guide element, in particular the guide groove. Preferably, the guide unit is designed as a sword. In this case, the term "sword" should in particular define a geometric shape which, viewed in the cutting plane, has a self-contained outer contour which has at least two straight lines extending parallel to one another and to which at least two respectively facing ends of the straight lines interconnecting connecting sections, in particular arcs comprises. Thus, the guide unit has a geometric shape, which, viewed in the cutting plane, composed of a rectangle and at least two arranged on opposite sides of the rectangle circular sectors. The term

"Cutting plane" should in particular define a plane in which the

Cutting strand is moved in at least one operating state along a circumference of the guide unit in at least two mutually oppositely directed cutting directions relative to the guide unit. Preferably, the cutting plane is aligned at least substantially transversely to a machined workpiece surface when machining a workpiece. By "at least substantially transversely" is meant in particular an alignment of an e-plane and / or a direction relative to a further plane and / or a further direction, preferably from a parallel orientation of the plane and / or the direction However, it is also conceivable that the cutting plane is aligned at least substantially parallel to a machined workpiece surface when machining a workpiece, in particular when forming the cutting strand as an abrasive, etc. at least substantially parallel "should here be understood, in particular, an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction relative to the reference direction is a deviation, in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.

A "cutting direction" is to be understood here as meaning, in particular, a direction along which the cutting strand is used to produce a cutting gap and / or to remove and / or remove material particles of a workpiece to be machined in at least one operating state as a result of a drive force and / or a In one operating state, the cutting strand is preferably moved relative to the guide unit along the cutting direction. The term "closed system" should in particular define a system which comprises at least two components which are combined by means of cooperation in one disassembled state of the system from a parent to the system

System, such as a portable power tool, a functional maintained lity and / or are permanently connected to each other in the disassembled state. Preferably, the at least two components of the closed system are at least substantially inseparably connected with each other for an operator. By "at least substantially insoluble" should be understood here in particular a combination of at least two components that only with the aid of separation tools, such as a saw, in particular a mechanical saw, etc., and / or chemical release agents, such as solvents A "tool stabilization device" is to be understood here as meaning, in particular, a device which is provided with at least one support force along a direction at least substantially perpendicular to the cutting plane of the cutting strand during machining of a workpiece onto the machine tool parting device , in particular on the guide unit, for stabilization, in particular for avoiding and / or for reducing bending of the guide unit. Particularly preferably, the tool stabilization device in a subregion of the machine tool parting device, in particular the guide unit, exerts a supporting force on the machine tool parting device, in particular on the guide unit, which, viewed in a direction away from the portable machine tool, between a machine tool housing and a surface of a is arranged to be processed tool.

A "region arranged outside the coupling device" should be understood here to mean, in particular, a region of the portable machine tool, in particular a machine tool housing, which is at least more than 1 cm, preferably more than 3 cm and particularly preferably at least more than 6 cm apart from a rotational axis of a Output element of a drive unit and / or a gear unit of the portable power tool for driving the cutting strand is arranged and / or it should be understood in particular a region of the machine tool separating device, in particular the guide unit, which is not directly engaged by coupling members of the coupling device and / or The term "stabilization" is intended here in particular to affect at least one compulsive force starting from the Defining a tool stabilizing device on the power-tool parting device, in particular on the guide unit, in a state of the power-tool parting device coupled to the coupling device, which is intended to detect a deviation of alignment of the power-tool parting device, in particular a longitudinal axis of the guide unit, from a predetermined alignment of the power-tool parting device, in particular the management unit, at least as far as possible to prevent. A "constraining force" should be understood here to mean, in particular, a force which is intended to prevent a body from moving in at least one direction and / or the body to move on a body by means of a movement

Influence of force on the body to keep predetermined path. By means of the embodiment according to the invention can advantageously be achieved by means of the machine tool cutting device comfortable working. In addition, a deflection of the guide unit during a machining of a workpiece can advantageously be advantageously prevented.

Furthermore, it is proposed that the tool stabilization device has at least one further stabilization element with at least one support surface which, together with the stabilization element, delimits a stabilization region. Preferably, in a state coupled to the coupling device, the power-tool parting device is arranged at least partially in the stabilization region. Particularly preferably, the machine tool separating device, in particular the guide unit, is arranged at least partially between the stabilizing element and the further stabilizing elements of the tool stabilizing device in a state coupled to the coupling device along an at least substantially perpendicular direction to a cutting plane of the cutting strand. The term "between" is intended here to define, in particular, a spatial arrangement of a component along at least one direction between two subregions of a further component or between two further components, wherein preferably at least one straight line exists along the direction which the component and the two subregions of the component Advantageously, at least the guide unit rests against the at least two stabilizing elements at least in a partial area of the guide unit, Preferably, one of two outer surfaces of the guide unit lies directly in each case at one of the two outer surfaces Guide unit facing side wall of one of the stabilizing elements. Preferably, each outer surface is in each case with more than 10% of a total surface area of the outer surface, preferably with more than 20% and more preferably with more than 30% on the guide unit facing side wall of one of the stabilizing elements. In particular, the outer surfaces abut in a partial region of the guide unit on the coupling elements, which are arranged at least more than 5%, preferably more than 10% and particularly preferably at least more than 15% of a total length of the guide unit spaced apart from a torque introduction point for driving the cutting strand is. Thus, the stabilizing elements are preferably provided for stabilizing and / or supporting the power-tool parting device, in particular the guide unit, at least in two oppositely directed directions. It can be advantageous bilateral stabilization of the machine tool separating device, in particular the guide unit, realized. Furthermore, particularly high lateral stability of the machine tool separating device, in particular the guide unit, can be achieved when machining workpieces.

It is also proposed that the portable power tool has at least one support unit for resting on a workpiece. A "support unit" is to be understood here as meaning in particular a unit which rests on the workpiece during machining of a workpiece by means of the portable machine tool with proper handling of the portable machine tool, in particular with the support surface of the support unit, and which is provided for this purpose portable machine tool during one

Support machining of the workpiece on the workpiece. Particularly preferably, the support unit is designed as a sliding block and / or as a base plate. Preferably, the portable machine tool slides during a machining of the workpiece by means of the support unit, in particular with the support surface of the support unit, on a surface of the workpiece to be machined.

Advantageously, guidance of the portable power tool during machining of a workpiece can be achieved. Furthermore, a high level of operating comfort for an operator when machining a workpiece by means of the portable machine tool can advantageously be achieved. Preferably, the stabilizing element and / or the further stabilizing element has an extension, which, viewed at least substantially flush with the bearing surface along an at least substantially perpendicular to a support surface of the support unit. Particularly preferably, the stabilization element and / or the further stabilizing element has an extension which, viewed along a direction away from the portable machine tool, in particular from a machine tool housing of the portable machine tool, terminates at least substantially flush with a support surface of the support unit. The term "at least substantially flush" is to be understood here in particular as an arrangement of the stabilizing element and / or the further stabilizing element in an assembled state, the stabilizing element and / or the further stabilizing element being in an assembled state, along a longitudinal axis of the stabilizing element and / or Starting from a machine tool housing, it extends in the direction of the support surface of the support unit and extends as far as the support surface of the support unit.

By "in one piece" should be understood in particular to be at least materially bonded, for example by a welding process, an adhesive process, an injection process and / or another process that appears expedient to a person skilled in the art, and / or advantageously shaped in one piece, for example However, it is also conceivable that the stabilizing element and / or the further stabilizing element is formed by a component formed separately from the machine tool housing and In this case, the stabilizing element and / or the further stabilizing element may at least partially be received in a recess of the machine tool housing n. It can be advantageously achieved a chip breakage protection function by means of the stabilizing element and / or the further stabilizing element. In addition, it is proposed that the tool stabilizing device has at least one spring element which is provided to act on at least the stabilizing element and / or the further stabilizing element with a spring force. A "spring element" is to be understood in particular as a macroscopic element which has at least one extension that is elastically changeable by at least 10%, in particular by at least 20%, preferably by at least 30% and particularly advantageously by at least 50% in a normal operating state , and which in particular produces a counterforce which is dependent on a change in the extent and preferably proportional to the change and which counteracts the change. "Extension" of an element is understood to mean, in particular, a maximum distance between two points of a vertical projection of the element onto a plane , A "macroscopic element" is to be understood as meaning, in particular, an element with an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm Cutting depth of the machine tool cutting device, in particular of the cutting strand can be achieved.

Furthermore, the invention is based on a power-tool parting device, in particular a hand-held power tool separating device, for a portable power tool according to the invention. The machine tool separating device comprises at least one cutting strand and at least one guide unit, which forms a closed system at least together with the cutting strand. Advantageously, the power-tool parting device has at least one torque-transmitting element for driving the cutting strand, which is mounted at least partially in the guide unit. Preferably, the torque transmission element is at least partially surrounded along at least one direction by outer walls of the guide unit. Preferably, the torque transmission element has a concentric coupling recess, into which a pinion of the motor unit and / or a toothed wheel and / or a toothed shaft of the gear unit can engage in an assembled state. The coupling recess is in this case preferably formed by a hexagon socket. However, it is also conceivable that the coupling Another embodiment that appears appropriate to a person skilled in the art has By means of the embodiment of the machine tool cutting device according to the invention, a closed system can be achieved in a structurally simple manner, which can be conveniently mounted by an operator on a machine tool provided for this purpose. Thus, it may be advantageous to dispense with an individual assembly of components, such as the cutting strand, the guide unit and the torque transmitting element, by the operator for use of the power-tool parting device according to the invention.

Furthermore, it is proposed that the cutting strand has at least one cutter support element which has on a side of the cutter support element facing the torque transmission element at least one recess into which the torque transmission element engages in at least one operating state for driving the cutting strand. In this case, the torque transmission element is preferably designed as a toothed wheel which has a multiplicity of teeth for driving the cutting strand along a circumferential direction extending in a plane extending perpendicular to the axis of rotation. The recess of the cutter carrier element is preferably formed corresponding to an outer contour of the teeth of the torque transmission element designed as a gear. However, it is also conceivable that the torque transmission element and / or the cutter support element has another, a skilled person appear appropriate design.

Furthermore, the invention is based on a machine tool system with at least one portable power tool according to the invention and with at least one power-tool parting device according to the invention. Advantageously, the tool stabilizing device is provided for, in a coupled to the coupling device state, the machine tool separating device viewed in a direction away from the portable machine tool in a region outside the coupling device of the machine tool separating device along at least substantially perpendicular to a cutting plane of the cutting strand Stabilize direction. It can advantageously have a high lateral stability the machine tool separating device, in particular the guide unit, are achieved in a machining of a workpiece.

The machine tool separating device according to the invention and / or the portable power tool according to the invention should not be limited to the application and embodiment described above. In particular, the machine tool separating device according to the invention and / or the portable power tool according to the invention may have a number deviating from a number of individual elements, components and units specified herein for fulfilling a mode of operation described herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 shows a portable power tool according to the invention with a machine tool separating device according to the invention in a schematic representation,

2 is a detailed view of a tool stabilizing device of the portable power tool according to the invention in a schematic representation,

3 is a detailed view of a machine tool according to the invention nentrennvorrichtung in a schematic representation,

4 shows a sectional view along the line IV-IV from FIG. 3 of the power-tool parting device according to the invention in a schematic illustration, Fig. 5 is a detail view of cutter support elements of a

Cutting strand of the machine tool separating device according to the invention in a schematic representation,

6 shows a further detailed view of one of the cutter carrier elements of the cutting strand of the machine tool separating device according to the invention in a schematic representation,

7 is a detailed view of an arrangement of the cutter support elements in a guide unit of the machine tool separating device according to the invention in a schematic representation,

8 shows an alternative inventive portable power tool with an alternative tool stabilization device in a schematic representation and

9 shows a detailed view of the alternative tool stabilization device of the alternative portable power tool according to the invention in a schematic illustration.

Description of the embodiments

FIG. 1 shows a portable machine tool 10a with a machine tool separating device 18a, which together form a machine tool system. The portable power tool 10a has a coupling device 12a for the positive and / or non-positive coupling with the machine tool separating device 18a. In this case, the coupling device 12a can be designed as a bayonet closure and / or as another coupling device that appears meaningful to a person skilled in the art. Further, the portable power tool 10a has a power tool housing 56a enclosing a drive unit 58a and a gear unit 60a of the portable power tool 10a. The drive unit 58a and the gear unit 60a are operatively connected with one another in a manner already known to a person skilled in the art in order to generate a drive torque which can be transmitted to the power-tool parting device 18a. Here, the drive unit 58a and / or the gear unit 60a are provided to be coupled in a mounted state by means of the coupling device 12a with a cutting strand 14a of the machine tool separating device 18a. The gear unit 60a of the portable power tool 10a is formed as an angle gear. The drive unit 58a is designed as an electric motor unit. However, it is also conceivable for the drive unit 58a and / or the gear unit 60a to have another configuration that appears appropriate to a person skilled in the art. The drive unit 58a is provided to drive the cutting strand 14a of the machine tool separating device 18a in at least one operating state with a cutting speed of less than 6 m / s. In this case, the portable power tool 10a has at least one operating mode in which a drive of the cutting strand 14a in a guide unit 16a of the machine tool separating device 18a along a cutting direction 62a of the cutting strand 14a with a cutting speed of less than 6 m / s is made possible. Furthermore, the portable power tool 10a comprises a support unit 32a for resting on a workpiece to be machined by the portable power tool 10a (not shown here). The support unit 32a is designed as a sliding block and / or as a base plate, by means of which and / or which the portable power tool 10a slides and / or is supported on the workpiece during proper handling during machining of a workpiece.

Furthermore, the portable power tool 10a comprises a tool stabilizing device 20a which, in a region arranged outside the coupling device 12a, has at least one stabilizing element 22a with a support surface 24a (FIG. 2) for stabilizing the power-tool parting device 18a. The support surface 24a of the stabilization element 22a is arranged in a state coupled to the coupling device 12a of the tool-machine separating device 18a on a side of the stabilization element 22a facing the guide unit 16a. The tool stabilizing device 20a further comprises a further stabilizing element 26a with a supporting surface 28a, which together with the stabilizing element 22a delimit a stabilizing region 30a for stabilizing the power-tool separating device 18a. The further stabilizing element 26a is likewise arranged in the region arranged outside the coupling device 12a. The further supporting surface 28a of the further stabilizing element 26a is arranged in a coupled to the coupling device 12a state of the machine tool separating device 18a on one of the guide unit 16a facing side of the further stabilizing element 26a. The support surface 24a of the stabilizing element 22a and the further supporting surface 28a of the further stabilizing element 26a extend at least substantially parallel to the cutting plane of the cutting strand 14a. The stabilizing element 22a and the further stabilizing element 26a are formed integrally with the machine tool housing 56a. Thus, the tool stabilizing device 20a is provided for guiding the guide unit 16a of the machine tool separating device 18a in a state coupled to the coupling device 12a along a direction away from the portable power tool 10a, along a portion of the power tool separating device 18a located outside the coupling device 12a to stabilize at least substantially perpendicular to a cutting plane of the cutting strand 14a extending direction 54a. In this case, the guide unit 16a bears against the support surface 24a of the stabilization element 22a and against the further support surface 28a of the further stabilization element 26a.

FIG. 2 shows an arrangement of the tool stabilizing device 20a on the machine tool housing 56a of the portable power tool 10a. The tool stabilizing device 20a is, viewed along a direction away from the machine tool housing 56a, spaced from a rotation axis 142a of an output element of the drive unit 58a and / or the gear unit 60a for driving the cutting strand 14a coupled to the coupling device 12a state of the power tool separating device 18a on the machine tool housing 56a arranged. The machine tool separating device 18a is arranged in a coupled state with the coupling device 12a with a partial region, viewed along a direction at least substantially perpendicular to the cutting plane of the cutting strand 14a, between the stabilizing element 22a and the further stabilizing element 26a. The stabilizing element 22a and the further stabilizing element 26a each have an extension, which, starting from the machine tool housing 56a along at least substantially perpendicular to a support surface 34a of the support unit 32a, at least substantially flush with the support surface 34a. The support surface 34a of the support unit 32a is in a processing of a workpiece on a surface (not shown here in detail) of the workpiece. The stabilizing element 22a and the further stabilizing element 26a lie in each case with a processing of a workpiece with a ner facing the workpiece side on the surface of the workpiece. Thus, the stabilizing element 22a and the further stabilizing element 26a are provided for processing a workpiece in addition to stabilizing the guide unit 16a, a tearing of chips in the area of cut edges of one can be introduced by means of the cutting strand 14a

To avoid cuts when machining a workpiece.

Further, the stabilizing member 22a and the further stabilizing member 26a stabilize the guide unit 16a when machining a workpiece in a portion of the guide unit 16a which, when machining a workpiece, viewed along the cutting direction 62a of the cutting strand 14a, between the coupling device 12a and a surface a workpiece to be machined is arranged. In this case, during machining of a workpiece by means of the supporting surface 24a of the stabilizing element 22a and by means of the further supporting surface 28a of the further stabilizing element

26a supporting forces along the at least substantially perpendicular to the cutting plane of the cutting strand 14a extending direction 54a on the guide unit 16a of the power tool separating device 18a. FIG. 3 shows the power-tool parting device 18a in one of the

Coupling device 12a of the portable power tool 10a decoupled state. The machine tool separating device 18a has the cutting strand 14a and the guide unit 16a, which together form a closed system. The guide unit 16a is designed as a sword. Furthermore, the guide unit 16a, viewed in the cutting plane of the cutting strand 14a, at least two convexly shaped ends 64a, 66a. The convex ends 64a, 66a of the guide unit 16a are arranged on two opposite sides of the guide unit 16a. The cutting strand 14a is guided by the guide unit 16a. For this purpose, the guide unit 16a at least one guide element 68a (Figure 7), by means of which the cutting strand

14a is guided. The guide element 68a is in this case formed as a guide groove 70a, which extends in the cutting plane of the cutting strand 14a along an entire circumference of the guide unit 16a. Here, the cutting strand 14a is guided by means of the guide groove 70a bounding edge regions of the guide unit 16a. However, it is also conceivable that the guide element

68a in another way that seems appropriate to a person skilled in the art. Such as, for example, as a rib-like Anformung on the guide unit 16 a, which engages in a recess on the cutting strand 14 a is formed. The cutting strand 14a, viewed in a plane perpendicular to the cutting plane, is surrounded on three sides by the edge regions delimiting the guide groove 70a (FIG. 7). The cutting strand 14a is circumferentially moved in the guide groove 70a relative to the guide unit 16a during operation.

Furthermore, the power-tool parting device 18a has a torque-transmitting element 40a at least partially mounted by means of the guide unit 16a for driving the cutting strand 14a. In this case, the torque transmission element 40a has a coupling recess 72a, which in a mounted state can be coupled to the drive unit 58a and / or the transmission unit 60a. The coupling recess 72a is arranged concentrically in the torque transmission element 40a. The coupling recess 72a is formed as a hexagon socket. However, it is also conceivable for the coupling recess 72a to have another configuration which appears appropriate to a person skilled in the art. In an uncoupled state of the torque transmission element 40a with the drive unit 58a and / or the gear unit 60a, the torque transmission element 40a is arranged transversely to the cutting direction 62a of the cutting strand 14a and / or along the cutting direction 62a in the guide unit 16a (FIG. 4). Here, the torque transmission element 40a is at least partially disposed between two outer walls 74a, 76a of the guide unit 16a. The outer walls 74a, 76a extend at least substantially parallel to the cutting plane of the cutting strand 14a. The guide unit 16a has in outer surfaces 78a, 80a of the outer walls 74a, 76a in each case a recess 82a, 84a, in which the torque transmission element 40a is at least partially arranged.

The torque transmission element 40a is arranged with a portion in the recesses 82a, 84a of the outer walls 74a, 76a. In this case, the torque transmission element 40a has, at least in the subregion arranged in the recesses 82a, 84a, an extension along an axis of rotation 86a of the torque transmission element 40a, which terminates flush with one of the outer surfaces 78a, 80a of the guide unit 16a. Furthermore, in the recesses 82a, 84a of the outer surfaces 78a, 80a of the guide unit 16a disposed portion of the torque transmitting member 40a has an at least substantially perpendicular to the rotation axis 86a of the torque transmitting member 40a extending outer dimension, which is at least 0.1 mm smaller than at least substantially perpendicular to the rotation axis 86a of the torque transmitting member 40a extending inner dimension of the recesses 82a, 84a , The subregion of the torque transmission element 40a arranged in the recesses 82a, 84a is arranged spaced apart along a direction perpendicular to the rotation axis 86a to an edge of the outer walls 74a, 76a delimiting the respective recess 82a, 84a. Thus, in the recesses

82a, 84a disposed portion of the torque transmitting member 40a a game within the recesses 82a, 84a on.

FIG. 5 shows a detailed view of cutter carrier elements 42a, 44a of the cutting strand 14a of the power tool separating device 18a. The cutting strand 14a comprises a plurality of interconnected cutter support elements 42a, 44a, each interconnected by a connecting element 88a, 90a of the cutting strand 14a, which is at least substantially flush with one of two outer surfaces 92a, 94a of one of the interconnected cutter support elements 42a, 44a (See also Figure 7). The connecting elements 88a, 90a are bolt-shaped. The outer surfaces 92a, 94a extend in a state arranged in the guide groove 70a of the cutting strand 14a at least substantially parallel to the cutting plane of the cutting strand 14a. Depending on the application, a person skilled in the art will select a suitable number of cutter carrier elements 42a, 44a for the cutting strand 14a. The cutter support elements 42a, 44a are each formed integrally with one of the connecting elements 88a, 90a. Furthermore, the cutter support elements 42a, 44a each have a connecting recess 96a, 98a for receiving one of the connecting elements 88a, 90a of the interconnected cutter support elements 42a, 44a. The connecting elements 88a, 90a are guided by means of the guide unit 16a (FIG. 7). Here, the connecting elements 88a, 90a are arranged in a mounted state of the cutting strand 16a in the guide groove 70a. The connecting elements 88a, 90a can, viewed in a plane perpendicular to the cutting plane, be supported on two side walls 100a, 102a of the guide groove 70a. The side walls 100a, 102a define the guide groove 70a along a perpendicular to the cutting plane extending direction. Further, the side walls 100a, 102a of the guide groove 70a, viewed in the cutting plane, extend outwardly from the guide unit 16a perpendicular to the cutting direction 62a of the cutting strand 14a.

The cutter support elements 42a, 44a of the cutting strand 14a each have a recess 50a, 52a, each of which is arranged in an assembled state on a torque transmitting element 40a facing side 46a, 48a of the respective cutter support member 42a, 44a. The torque transmission element 40a engages in the recesses 50a, 52a in at least one operating state for driving the cutting strand 14a. The torque transmitting member 40a is formed here as a gear. Thus, the torque transmitting element 40a comprises teeth 104a, 106a (FIG. 4) intended, in at least one operating state, for driving the cutting strand 14a into the recesses 50a, 52a of the cutter support elements 42a.

44a intervene. Further, the torque transmitting member 40a facing sides 46a, 48a of the cutter support members 42a, 44a are circular arc-shaped. The sides 46a, 48a of the cutter support elements 42a, 44a which face the torque transmission element 40a in an assembled state are in each case in partial areas 108a, 110a, 112a, 114a, between a

Central axis 116a of the respective connecting element 88a, 90a and a central axis 118a, 120a of the respective connecting recess 96a, 98a viewed, designed in a circular arc. The arcuate portions 108a, 110a, 112a, 114a are respectively formed adjacent to the recesses 50a, 52a engaged by the torque transmitting member 40a.

In this case, the circular-arc-shaped partial regions 108a, 110a, 112a, 114a have a radius which corresponds to a radius of a profile of the guide groove 70a at the convex ends 64a, 66a. The portions 108a, 110a, 112a, 114a are concave (Figure 6).

Furthermore, the cutting strand 14a has a plurality of cutting elements 122a, 124a. The cutting elements 122a, 124a are each formed integrally with one of the cutter support elements 42a, 44a. A number of the cutting elements 122a, 124a depend on a number of cutter support elements 42a, 44a. A person skilled in the art will depend on the number of cutter carrier elements 42a,

44a select a suitable number of cutting elements 122a, 124a. The Cutting elements 122a, 124a are provided to allow a separation and / or removal of material particles of a workpiece to be machined (not shown here). The cutting elements 122a, 124a can be designed, for example, as a chisel, semi-chisel or other types of cutting edge that appear appropriate to a person skilled in the art, which are intended to enable a separation and / or removal of material particles of a workpiece to be machined. The cutting strand 14a is endless. Thus, the cutting strand 14a is formed as a cutting chain. The cutter support elements 42a, 44a are in this case designed as chain links, which are connected to one another by means of the bolt-shaped connecting elements 88a, 90a. However, it is also conceivable that the cutting strand 14a, the cutter support elements 42a, 44a and / or the connecting elements 88a, 90a are configured in another manner that appears appropriate to a person skilled in the art.

FIGS. 8 and 9 show an alternative embodiment. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, the reference numerals of the embodiments, the letters a and b are added. The following description is essentially limited to the differences from the first exemplary embodiment in FIGS. 1 to 7, wherein reference can be made to the description of the first exemplary embodiment in FIGS. 1 to 7 with regard to components, features and functions remaining the same.

FIG. 9 shows an alternative portable machine tool 10b with a machine tool separating device 8b, which together form a machine tool system. The power-tool parting device 18b has a construction analogous to the power-tool parting device 14a described in FIGS. 1 to 7. The portable power tool 10b has a coupling device 12b which can be coupled to the power-tool separating device 18b formed from a cutting strand 14b and a guide unit 16b. In addition, the portable power tool 10b includes a tool stabilizing device 20b. The tool stabilizing device 20b is in this case mounted linearly movably on a machine tool housing 56b of the portable power tool 10b. The machine tool housing 56b has two guide recesses 126b, 128b, in which two guide elements are mounted in a mounted state movable relative to the machine tool housing 56b (Figure 9). The guide elements 126b, 128b are integrally formed with a stabilizing element 22b and a further stabilizing element 26b of the tool stabilizing device 20b. The guide recesses 126b, 128b extend in a coupled state of the machine tool separating device 18b with the coupling device 12b in two planes arranged at least substantially parallel to a cutting plane of the cutting strand 14b. To secure the guide elements 130b, 132b against falling out of the guide recesses 126b, 128b, the guide elements 130b, 132b, for example by means of threaded bolts (not shown here), which engage in a slot (not shown here) of the guide elements 130b, 132b, in the guide recesses 126b, 128b secured. However, it is also conceivable that the guide elements 130b, 132b are secured against falling out by means of other securing elements which appear to be useful to a person skilled in the art. The guide recesses 126b, 128b have a greater extent than the guide elements 130b, 132b along a longitudinal movement direction of the guide elements 130b, 132b, along which the guide elements 130b, 132b are arranged to be linearly movable in the guide recesses 126b, 128b.

Furthermore, the tool stabilizing device 20b comprises two spring elements 36b, 38b, which are provided to act on the stabilizing element 22b and the further stabilizing element 26b in a direction away from the machine tool housing 56b with a spring force. The spring elements 36b, 38b are arranged in the guide recesses 126b, 128b. Thus, the spring elements 36b, 38b are each supported by one end 134b, 136b of the spring elements 36b, 38b on an edge region of the machine tool housing 56b delimiting the respective guide recess 126b, 128b. With another end 138b, 140b of the spring elements 36b,

38b, the spring elements 36b, 38b are each supported on a side of the respective guide element 130b, 132b facing the respective spring element 36b, 38b. The spring elements 36b, 38b are designed as compression springs. However, it is also conceivable that the spring elements 36b, 38b have another configuration that appears appropriate to a person skilled in the art. At a

Machining a workpiece (not shown here) by means of the factory The machine tool separating device 18b may have a supporting surface 24b of the stabilizing element 22b and a further supporting surface 28b of the further stabilizing element 26b due to the movable mounting of the guide elements 130b, 132b and the one-piece embodiment with the guide elements 30b, 132b on outer walls 74b, 76b of the guide unit 16b

Longitudinal movement direction of the guide elements 130b, 132b slide. The stabilizing element 22b and the further stabilizing element 26b are pressed onto a surface of the workpiece as a result of the spring force of the spring elements 36b, 38b during machining of a workpiece.

Claims

claims

A portable machine tool, in particular a hand tool machine, comprising at least one coupling device (12a, 12b) for coupling to at least one cutting strand (14a, 14b) and at least one guide unit (16a, 16b) for guiding the cutting strand (14a, 14b) Machine tool separating device is provided,

characterized by at least one tool stabilizing device (20a; 20b) which has at least one stabilizing element (22a; 22b) in at least one supporting surface (24a; 24b) for stabilizing the machine tool separating device in an area arranged outside the coupling device (12a; 12b).

2. Portable machine tool according to claim 1,

characterized in that the tool stabilizing device (20a, 20b) has at least one further stabilizing element (26a, 26b) with at least one supporting surface (28a, 28b), which together with the stabilizing element (22a, 22b) delimit a stabilizing region (30a, 30b).

3. Portable machine tool according to one of the preceding claims, characterized by at least one support unit (32a) for resting on a workpiece.

4. Portable machine tool according to claim 3,

characterized in that the stabilizing element (22a) and / or the further stabilizing element (26a) has an extension which, viewed at least substantially perpendicular to a support surface (34a) of the support unit (32a), at least substantially flush with the support surface (34a) completes.

5. Portable machine tool at least according to claim 2,

characterized in that the tool stabilizing device (20b) has at least one spring element (36b, 38b) which is provided to act on at least the stabilizing element (22b) and / or the further stabilizing element (26b) with a spring force.

6. A machine tool separating device for a portable power tool according to one of claims 1 to 5, comprising at least one cutting strand (14a) and at least one guide unit (16a) for guiding the cutting strand (14a), at least together with the cutting strand (14a) a closed system forms.

7. Machine tool separating device according to claim 6,

characterized by at least one torque transmission element (40a) which is at least partially mounted in the guide unit (16a).

8. Machine tool system according to claim 7,

characterized in that the cutting strand (14a) has at least one cutter support element (42a, 44a) which has on a torque transmission element (40a) facing side (46a, 48a) of the cutter support member (42a, 44a) at least one recess (50a, 52a) in which the torque transmission element (40a) engages in at least one operating state for driving the cutting strand (14a).

9. Machine tool system with at least one portable power tool according to one of claims 1 to 5, and with at least one machine tool separating device according to one of claims 6 to 8.

10. Machine tool system according to claim 9,

characterized in that the tool stabilizing device (20a; 20b) is provided for, in a state coupled to the coupling device (12a; 12b), viewed along a direction away from the portable power tool, the tool cutting device in an outside of the coupling device (12a; 12b). to stabilize the arranged region of the power-tool parting device along a direction (54a, 54b) extending at least substantially perpendicular to a cutting plane of the cutting strand (14a, 14b).